(10 points) In a study to estimate the proportion of residents in a city that support the construction of a new bypass road in the vicinity, a random sample of 900 residents were polled. Let X denote the number in the sample XV/2 The estimator p has bias who supported the proposal. To estimate the true proportion in support of the plan, we can compute p = O A. 1/(2 x 30). 3 D O B.0, so unbiased. O C. 1/30. O D. 30/2. O E. 1/900. preview answers
(10 points) In a study to estimate the proportion of residents in a city that support the construction of a new bypass road in the vicinity, a random sample of 900 residents were polled. Let X denote the number in the sample XV/2 The estimator p has bias who supported the proposal. To estimate the true proportion in support of the plan, we can compute p = O A. 1/(2 x 30). 3 D O B.0, so unbiased. O C. 1/30. O D. 30/2. O E. 1/900. preview answers
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Problem 1.
(10 points) In a study to estimate the proportion of residents in a city that support the construction of a new bypass road in the vicinity, a random sample of 900 residents were polled. Let X denote the number in the sample
who supported the proposal. To estimate the true proportion in support of the plan, we can compute p
X+/900/2 The estimator p has bias
900
O A. 1/(2 x 30).
B.
DE
D
OB. 0, so unbiased.
A
145
OC. 1/30.
O D. 30/2.
+
1
O E. 1/900.
?
Problem 2.
(10 points) Based on a random sample of 50, a 95% confidence interval for the population proportion was computed. Holding everything else constant, which of the following will reduce the length of the confidence interval by
at about a half? (CHECK ALL THAT ADDI V
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